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FRP (Fiberglass Reinforced Plastic) sheets are highly valued in vessel solutions for their excellent strength-to-weight ratio, corrosion resistance, and design flexibility . They are used in a wide range of marine craft, from small boats and yachts to larger specialized vessels .
The table below summarizes the key properties and advantages of FRP in marine applications:
| Feature | Description | Key Advantage in Marine Use |
| Lightweight & High Strength | Excellent strength-to-weight ratio (specific strength and stiffness) | Reduces vessel weight for improved performance and fuel efficiency; allows for larger payloads |
| Corrosion Resistance | Can be molded into complex shapes; properties can be tailored through fiber layup and resin selection | Superior durability and lower maintenance costs compared to steel or wood; longer service life . |
| Design Flexibility | Can be molded into complex shapes; properties can be tailored through fiber layup and resin selection | Allows for optimized structural design and aesthetic freedom |
| Other Properties | Non-magnetic, good impact toughness, sound and heat insulation | Ideal for minesweepers; absorbs collision energy; enhances comfort and safety . |
Applications in Vessel Construction
FRP sheets and composites are used in various parts of a vessel:
Hulls and Decks: FRP is the primary material for hulls and decks of many boats, providing a seamless, watertight structure . Specialized sandwich structures with FRP skins and foam cores offer high stiffness and lightness for hulls, decks, and bulkheads .
Internal Structures: FRP panels are used for interior bulkheads, ceilings, cabins, doors, furniture, and partitions, contributing to weight reduction and durability .
Specialized Vessels: Its non-magnetic property makes FRP particularly valuable for building minesweepers and hunter boats . Its impact toughness is beneficial for fishing boats and other work boats that may face collisions or squeezing .
Practical Considerations
Construction Methods: Traditional hand lay-up is common, but vacuum bag molding can significantly improve mechanical performance . Mold-free techniques using pre-manufactured FRP panels and profiles with interlocking edges can reduce costs and simplify the process .
Fire Safety: Standard FRP resins are combustible and can produce toxic fumes when burning . For enhanced safety, use fire-retardant resins or apply intumescent coatings and fire-resistant cladding (e.g., magnesium oxide boards) to achieve up to 60 minutes of fire resistance .
Material Enhancements: Hybrid composites combining glass fibers with other fibers like Kevlar or carbon can improve mechanical performance and reduce weight .
Key Takeaways for Vessel Solutions
Prioritize Weight Savings: FRP is an excellent choice for high-performance vessels and superstructures where reducing weight is critical .
Consider Total Life-Cycle Cost: While initial material costs may be higher, FRP’s corrosion resistance leads to lower maintenance and longer life, offering good economic value over time .
Plan for Fire Safety Early: If fire resistance is a requirement, incorporate fire-retardant materials or protective cladding into the initial design .